Reland "Split perf-test-specific resources in low_bandwidth_audio_test"

This is a reland of 4bbc150b18e961811991e3e524378e703b6d5b31

Now with explicitly specified `write_runtime_deps`

Original change's description:
> Split perf-test-specific resources in low_bandwidth_audio_test
>
> Bug: chromium:755660
> Change-Id: I7c60a47b26ad86892218497f28a09a04574077e6
> Reviewed-on: https://webrtc-review.googlesource.com/61961
> Reviewed-by: Patrik Höglund <phoglund@webrtc.org>
> Commit-Queue: Oleh Prypin <oprypin@webrtc.org>
> Cr-Commit-Position: refs/heads/master@{#22439}

Bug: chromium:755660
TBR: phoglund@webrtc.org
Change-Id: I3d4bcc5156ee25de399ab23773ecb73cd995075c
Reviewed-on: https://webrtc-review.googlesource.com/62660
Commit-Queue: Oleh Prypin <oprypin@webrtc.org>
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#22483}
diff --git a/audio/BUILD.gn b/audio/BUILD.gn
index b086971..83d5b1b 100644
--- a/audio/BUILD.gn
+++ b/audio/BUILD.gn
@@ -189,10 +189,27 @@
       }
 
       data = [
-        "../resources/voice_engine/audio_dtx16.wav",
+        "../resources/voice_engine/audio_tiny16.wav",
+      ]
+
+      if (!build_with_chromium && is_clang) {
+        # Suppress warnings from the Chromium Clang plugin (bugs.webrtc.org/163)
+        suppressed_configs += [ "//build/config/clang:find_bad_constructs" ]
+      }
+    }
+
+    group("low_bandwidth_audio_perf_test") {
+      testonly = true
+
+      deps = [
+        ":low_bandwidth_audio_test",
+      ]
+
+      data = [
+        "test/low_bandwidth_audio_test.py",
+        "${root_out_dir}/low_bandwidth_audio_test",
         "../resources/voice_engine/audio_tiny16.wav",
         "../resources/voice_engine/audio_tiny48.wav",
-        "test/low_bandwidth_audio_test.py",
       ]
       if (is_linux || is_android) {
         data += [
@@ -212,10 +229,7 @@
         data += [ "../tools_webrtc/audio_quality/mac/pesq" ]
       }
 
-      if (!build_with_chromium && is_clang) {
-        # Suppress warnings from the Chromium Clang plugin (bugs.webrtc.org/163)
-        suppressed_configs += [ "//build/config/clang:find_bad_constructs" ]
-      }
+      write_runtime_deps = "${root_out_dir}/${target_name}.runtime_deps"
     }
   }
 
diff --git a/tools_webrtc/mb/gn_isolate_map.pyl b/tools_webrtc/mb/gn_isolate_map.pyl
index 3dbb4a8..8c7a887 100644
--- a/tools_webrtc/mb/gn_isolate_map.pyl
+++ b/tools_webrtc/mb/gn_isolate_map.pyl
@@ -67,7 +67,7 @@
     ],
   },
   "low_bandwidth_audio_perf_test": {
-    "label": "//audio:low_bandwidth_audio_test",
+    "label": "//audio:low_bandwidth_audio_perf_test",
     "type": "script",
     "script": "//audio/test/low_bandwidth_audio_test.py",
     "args": [